<!--
 * @Author: error: error: git config user.name & please set dead value or install git && error: git config user.email & please set dead value or install git & please set dead value or install git
 * @Date: 2023-03-18 12:26:44
 * @LastEditors: error: error: git config user.name & please set dead value or install git && error: git config user.email & please set dead value or install git & please set dead value or install git
 * @LastEditTime: 2023-03-18 13:14:58
 * @FilePath: \从0到1的楷楷\从0到1的楷楷\pink系列\Javasritp\第二天\作业\用户输入一个数，  计算 1 到这个数的累加和.html
 * @Description: 这是默认设置,请设置`customMade`, 打开koroFileHeader查看配置 进行设置: https://github.com/OBKoro1/koro1FileHeader/wiki/%E9%85%8D%E7%BD%AE
-->
<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <script>
        //用户输入一个数，  计算 1 到这个数的累加和
        let i = 0;
        let num=0
        let sum = +prompt("请输入一个数字");
        while (i <= sum) {
            num+=i
            i++

            }
            
        
        alert(`累加和为${num}`)
    </script>
</body>

</html>